The Ford Barn

48fordconv · 02-09-2016, 06:31 PM

I'm converting my 48 Ford to 12 volt. What size battery would be best to fix in stock battery tray. Also what is a good coil to use with stock Ford Dis.
Who makes good drop resistors for gauges, heater motor. thanks for any help.

G.M. · 02-10-2016, 08:09 AM

Quote:

Originally Posted by Steve-Maine

I'm converting my 48 Ford to 12 volt. What size battery would be best to fix in stock battery tray. Also what is a good coil to use with stock Ford Dis.
Who makes good drop resistors for gauges, heater motor. thanks for any help.

Have Skip Haney rebuild your old Ford coil and rewind it for 12 volts
NEG ground, Use the large white 59 Ford resistor. G.M.

jimTN · 02-10-2016, 08:23 AM

You are heading into an unnecessary mess with 12v. All your instruments are very sensitive to no more than 4v and will burn out if not correct. There is absolutely no reason a flathead Ford will not run fine on 6v. If you want brighter headlights, fix your grounds. Even engines with HC heads will start on 6v when you have good grounds.

jerry shook · 02-10-2016, 10:42 AM

Sponsored Links (Register now to hide all advertisements)

I have run an 8-volt alternator an battery on two flatheads for years better starting brighter lights more power then 6-volt with great grounds. I know a lot of people that don"t like 8-volt but it works great for me. Simple to install. With 12-volt you have to change a lot or use resistors.

02-09-2016, 06:31 PM	#1
48fordconv Senior Member Join Date: May 2010 Location: Portland, ME Posts: 132	12 volt coil and battery for 48 Ford I'm converting my 48 Ford to 12 volt. What size battery would be best to fix in stock battery tray. Also what is a good coil to use with stock Ford Dis. Who makes good drop resistors for gauges, heater motor. thanks for any help.

02-10-2016, 08:23 AM	#3
jimTN Senior Member Join Date: May 2010 Location: Powell, TN Posts: 2,509	Re: 12 volt coil and battery for 48 Ford You are heading into an unnecessary mess with 12v. All your instruments are very sensitive to no more than 4v and will burn out if not correct. There is absolutely no reason a flathead Ford will not run fine on 6v. If you want brighter headlights, fix your grounds. Even engines with HC heads will start on 6v when you have good grounds.

02-10-2016, 10:42 AM	#4
jerry shook Senior Member Join Date: Nov 2010 Posts: 516	Re: 12 volt coil and battery for 48 Ford Sponsored Links (Register now to hide all advertisements) I have run an 8-volt alternator an battery on two flatheads for years better starting brighter lights more power then 6-volt with great grounds. I know a lot of people that don"t like 8-volt but it works great for me. Simple to install. With 12-volt you have to change a lot or use resistors.